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Description

DS18 FX1

The DS18 FX1 is a flush mount / surface mount 1-channel Class D car audio amplifier engineered for high-efficiency bass performance in subwoofer systems. Built with a sleek acrylic cover and rugged construction, it delivers 1 × 600–800 W RMS @ 4 Ω (depending on exact model configuration) of clean, stable Class D power to a single subwoofer load. Designed for custom audio installations where powerful low-end output, low distortion, and reliable protection features are essential, the FX1 is ideal for enthusiasts who want deep, controlled bass with efficient thermal management and a premium look.


Specifications

Item Specification
SKU FX1
Amplifier Class Digital (Class D)
Amplifier Type Monoblock / Subwoofer
Number of Channels 1
Total Watts (Peak) 2700W
Minimum Impedance 1 Ω
Body Color / Finish Black Aluminum
Waterproof Rating IP65 (Flush Mounting)

Power Output
Configuration RMS Power
@ 4 Ohm 1 × 400W
@ 2 Ohm 1 × 650W
@ 1 Ohm 1 × 900W
@ 4 Ohm (Bridged) N/A

Audio Performance
Parameter Value
Frequency Response 15 – 250 Hz
Signal-to-Noise Ratio 92 dB
Efficiency @ 4Ω 82%
Damping Factor 75
Input Impedance 30 kΩ
Channel Separation N/A
Total Harmonic Distortion (THD) 0.08%
Low Level Input Range 0.2 – 10 V

Crossover & Signal Control
Feature Specification
Selectable Crossover Fixed LPF
Crossover Filter Range 50 – 250 Hz
Bass Boost Range 0 – 12 dB
Bass Boost Frequency 50 Hz
Infrasonic Filter 10 – 50 Hz
Phase Selector 0° / 180°
High Level Input N/A

Features & Protection
Feature Availability
LED Indicator Power / Protect / Clip
Thermal Protection Yes
Over-Load Protection Yes
DC Output Protection Yes
Short Circuit Protection Yes
Voltage Input Protection Yes (8.8 – 15.9V)
Clipping Protection Yes
Cooling Fan No
Voltmeter No
Remote Level Control Yes

Inputs & Connectivity
Feature Specification
Input Channel Selectable No
RCA Low Level Output Yes
Tiffany RCA Connector Yes
Power Input Terminal Size 4 Ga
Fuse Size 80A (2 × 40A)

Construction & Design Features
Feature Included
Very High Efficiency Digital Circuit Design Yes
Anti-Corrosion PCB Coating Yes
Surface Mount Component Technology Yes
Audio Precision QC Verification Yes
Remote Level Control with Clip Indicator (Metal Case) Yes (Included)
Digital Chasing LED Adapter Yes (Included)

Dimensions & Weight
Measurement Value
Body Length 9″ / 228 mm
Body Width 4.7″ / 120 mm
Overall Height 1.85″ / 47 mm
Heatsink Length 10.8″ / 275 mm
Heatsink Width 7.2″ / 182 mm
Mounting Hole Spacing 9.2″ × 5.8″ / 233.7 × 147 mm
Mounting Depth 1.5″ / 39 mm
Gross Weight (Single Unit) 2.8 kg

 


Product Overview

Flush Or Surface Mount Class-D 1-Channel Amplifier

DS18’s FX1 packs a punch with high-quality sound output while maintaining a small footprint, making it perfect for those who value both power and space efficiency!
What sets DS18’s FX1 apart from other amplifiers on the market is its unique flush or surface installation mode. With the included surface mode adapter, you have the freedom to install this amplifier in standard or flush applications, giving you the flexibility to create a custom car audio setup that suits your style. Not only does this adapter provide versatile positioning options, but this frame has Digital LED’s controlled by a Built-In Digital Light Module!
Built for bass enthusiasts, the FX1 comes equipped with an included bass knob, providing you with the ability to fine-tune your audio output according to your unique listening preferences.
Thanks to its advanced digital class circuit design, DS18’s FX1 ensures that your sound experience remains crystal clear and powerful without any compromise. Equipped with a Fixed Low Pass Filter, LED clipping indicator, and direct insert power and speaker terminals, DS18’s FX1 offers unmatched convenience and ease of use during installation and setup. Its IP65 water-resistant coating and anti-corrosion protection ensure durability even in harsh environments, making it ideal for various applications such as ATV/RV roofs, boat walls, car audio panels, or racks.
With a total peak power output of 2700W and RMS power ranging from 400W at 4-ohm, 650W at 2-ohm, and 900W @ 1-ohm, this amplifier pushes your subwoofers for thunderous bass that will elevate your listening experience to new heights.
Choose DS18’s FX1 for a superior car audio experience!
*The FX Series adapters are not designed to be water-resistant. Please exercise caution to prevent water contact with the DIGITAL LED’S, as exposure may result in a short circuit*

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Questions and Answers

Q1: What is the DS18 FX1?

A1: The DS18 FX1 is a 1-channel (mono) Class D car audio amplifier designed to power a single subwoofer with clean, efficient output.

Q2: How many channels does the FX1 have?

A2: It has 1 channel (mono), specifically for subwoofer applications.

Q3: What power output does it produce?

A3: It delivers high-power RMS output — typically around 600 W to 800 W RMS @ 4 Ω (varies by specific variant), providing deep and distortion-free bass.

Q4: Where is this amplifier best used?

A4: It’s best for flush mount or surface mount custom installations powering a subwoofer in cars, trucks, or custom audio enclosures.

Q5: Does it include protection features?

A5: Yes — it includes advanced protection circuitry like thermal, overload, short-circuit, and under/over-voltage safeguards to protect the amp and subwoofer.


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